Do perpendicular lines intersect at a 60 degree angle?

Figure abcd is a parallelogram. if point c lies on the line x = 2, what is the y-value of point c

Is the point (0, 8) on the x-axis or y-axis? how do you know?

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)